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I have patients nested in clinics and repeated measures (only 2) from patients on a outcome and on a mediator. The patients (not the clinics) are also assigned to a control group and an intervention group. I am considering mplus because of the mediator which can vary within a patient and between patients. Maybe within and between clinics too, I'm not sure about that part. Can I approach this problem with mplus given that there are only 2 time periods? If so, should I be considering the long or the wide data format? Thank you. |
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You could do an intercept only growth model with two timepoints. I would put the data in the wide format. You could do a two-level analysis with clinics the highest level if you have at least 20 and preferable a minimum of 30-50 clinics. |
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ljc posted on Monday, August 12, 2013 - 6:58 pm
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Do Would I do something like iy| y1@-1 y2@1 to force the intercept be the difference? Thanks. |
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The growth model language would not work the way you want. You should instead say: f BY y1@-1 y2@1; |
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